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A disc starts rotating with a constant a...

A disc starts rotating with a constant angular acceleration of `1 rad//s^(2)` about a fixed vertical axis perpendicular to its plane and passing through its centre. A coin of mass `10 gm` is placed on the disc at a distance of `10cm` from the axis. The coefficent of friction between the disc and the coin is `0.2`. The value of the frictional force on the coin at `t=1s` will be

A

`0.02 N`

B

`0.014 N`

C

`0.001 N`

D

None of these

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